1321122232031 has 4 divisors (see below), whose sum is σ = 1509853979472. Its totient is φ = 1132390484592.

The previous prime is 1321122232021. The next prime is 1321122232061. The reversal of 1321122232031 is 1302322211231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321122232031 - 2¹⁸ = 1321121969887 is a prime.

It is a super-2 number, since 2×1321122232031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321122231988 and 1321122232006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321122232021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94365873710 + ... + 94365873723.

It is an arithmetic number, because the mean of its divisors is an integer number (377463494868).

Almost surely, 2^{1321122232031} is an apocalyptic number.

1321122232031 is a deficient number, since it is larger than the sum of its proper divisors (188731747441).

1321122232031 is an equidigital number, since it uses as much as digits as its factorization.

1321122232031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188731747440.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321122232031 its reverse (1302322211231), we get a palindrome (2623444443262).

The spelling of 1321122232031 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-two million, two hundred thirty-two thousand, thirty-one".